Crushing-rolls.



No(l 815,332. PATBNTBD MAR.'20, 1906.

A. QJMLKINS.4 y@RUSHING ROLLS.

APPLICATION FILED AUG.26, 1902.

UNITE 'STATES- PATENT OFFICE.

ALBERT o. oALKINs, for Los ANGELESQCALIFORNIA.

' CRUSHING-ROLLS.

AppiimionfuedAugugtz,1902. serial No. 121,139.-

Specification of Letters Patent.

' Patented March 20,1906.

T @ZZ whom, it may concern:

. Beit known that I, ALBERT C. CALKINs, a

citizen of the United States, residing at Los Angeles, in the county of Los Angeles, State of California, have invented and discovered a new and useful Improvement in Crushing- Rolls; and I do hereby declare the following to be a full, clear, and eXact descriptionof the invention, such as will enable others skilled ro in the art to which it appertains to makeand use the same.

This invention relates to improvements'in crushing-rolls for ores, minerals, and like hard substancesgand the objects of my improvement are,'first, to provide means for-pivoting the rolls inthe same horzontalplane; secj ond, to aHord facilities for retaining the rolls in the same horizontal 'plane and parallelwith eachother during thegcrushing opera- 2O strain `upon different portions of the rolls fourth, vto retain the rolls parallel to Veach other Vand in horizontal alinement with each other during the operation ofcrushing; fifth, to accommodate the passa e of infrangible substances betweenthe roflfs; sixth, to pre- Vent grooving and mutilatin the surfaces of the rolls by fragments of unyielding material, and, seventh, to makeprovisions for bringing together the contact-surfaces ofthe rolls after the passage therebetweenrof portions of metallic or other infrangible substances. I

attain these' obj ects. by fthe Vmechanism illustrated in theV accompanying drawings,l in which'- fl Figure 1 is a view in elevation of one side of themachine. Fig. 2 is a longitudinal sectionalview of the machine Von the line c a of Fig. 3. Fig. 3f is a topplan view of the lma chine. Fig.V 4 is a longitudinal sectional view onV the lineb bof Fig. 3,parts of the frame and ofthe yokes broken away; and Fig. 5 shows end and side views, respectively, of one of the eccentric sleeves.- The reference-numerals l l refer to the supports vfor the bed-plate 3 v,0f the machine. Through the upturned ends 2 2 at each end of the bed-plate 3 the shafts 5 fexte'nd across the bed-plate'B, and each projects slightly on either side thereof. At one end of thebedplate one of the shafts 5 5 vcarries thereon a hand-wheel 7, provided with a hub 10,and` a i handle 9, the latter projecting fromk the outer facethereof, by means of which handle 9 the crushing-rolls are-operated.` Preferablytfhowe tion; third, to obviate lateraland torsional4 gear 25 on the endlof the"l i ever, the crushing-rolls may be operated by a belt running over the peripheryy of thewheelF 7 t0 a -driving-shaft carrying a pulley thereoii (Not shown upon the drawings.) I

The two shafts 5 5 are each in like inafniier'] 6o secured within the upturned ends 2 2, which are made integral with the bed-plate'S'of the; machine, and a description of the manner which one of the shafts 5 5 is secured in one of the two upturned ends 2 2, made integral with the bed-plate 3, will in like manner'serve as descriptive of the construction by Iwhich, the other shaft 5 in the oppositefendof theI machine is secured therein. Each of: thef. y shafts are provided with hexagonal-portions ,76" 13113, and has secured thereon a cylindrical" sleeve 12, having bearings 15, (hereinafter rev-f' ferred to,) preferably made parts ofthe,ycl ke`sfl 20 20.v Each of the said bearings'l 15`oftlie, g yokes 20 20 and the cylindrical,sleeves'-f12'j,12 75" are each alike constructed, and they descrip-f" tion ofthe particular construction thereofat'; one endof the machine serves alikevforboth constructions. The yokes 20'20'vare identical in construction at Veach end' ofthe `8" as well as the crushing-rolls 30530,'caried1iril the free ends of the yokes 2O` 20',"each yokes is pivoted `upon the'ec'centi'fic`,sleeves 'V 12 12 at each end of themfachinef. ,Y

The shafts 5 5 in each Aendof themachneyjg are surrounded by the cylindrical :sleeves12f 12, which are secured within "thetwe-paitf .bearing-boxes 8 8, said' two part 'bearin '7 boXe'sS 8 being securedtogether byfmfeans" l Y screw-bolts 14, and to the ':fnwardlyfproject'9o5' ing portions of the -jornal- Q'Xe'sm8`8,'by'.4 means of screws or otherfsuitable,deyicesfthef,I Scrapers 16 16 are fastened and by; meansfjoffj whichground land trituratedmaterialfa herin to the'rolls 30"39y is"readily'remoi/edE 5 v,there om.

sition. l i d' I,i166 The shafts 29 and ,'31, 'jyournaled'in theffrexef, ends of the yokes 120,'20,x 'revolve finbearingsff in the hubs or loossesj31321v at thefeeends-off E, v the yokes' 20 2o. 14 IQ' vUpon one end-of"l heishaft`l2'9 'azlar'gei geI ,n 21 is secured', which meshes'with'afs'inall volves within its ejccentrie "5'1 e; k12,l Whenjthg, handtwheel 7, having-the hub .10 mad@ ja pft secured thereto. The revolution of the said wheel 7 causes the shaft 5 to revolve within its eccentric sleeve 12 within the bearingboX 8 and carries with it the gear 25, which causes the shaft 29 to revolve, and with the last-mentioned shaft 29 one of the crushingrolls 30, secured thereon, also revolves. The revolution of the last-mentioned shaft 5, having secured on the end thereof the band-pulley 22 and connected with the band-pulley 23 on the end of the other shaft 5 at the opposite end of the machine, is also caused to revolve. The last mentioned shaft 5 has upon the opposite end thereof the gear 35, which meshes with a larger gear 36, carries upon the end of the shaft 31, and has thereon a crushing-roll 30. The revolution of the band-pulley 23 by means of the cross-belt 24 causes the gear 35 to revolve and with it the gear 36 and one of the crushing-rolls 30, secured on the shaft 31.

The two crushing-rolls 30 30 are made of the same material and are secured on their respective shafts 29 and 31 in like manner. These two crushing-rolls are of the same size; but the two pulleys 22 and 23 are slightly different in diameter in order that the crushingrolls 30 30 revolve with slightly different rates of speed. The different rates of speed by which the said two rolls 30 30 are caused to revolve is for the purpose of preventing the crushed and disintegrated material from becoming caked upon said rolls.

Upon the tops of each of the hubs 34 34 of each of the yokes are a pair of lugs 40 40, and between each pair of said lugs 40 40 one end of the equalizing bar 43 rests. The said equaliZing-bar 43 has at or about the central portion thereof a slot 45, inwhich slot a screwthreaded bolt 46, having thereon a clampingnut 47, by means of which the equalizing-bar is clamped between the pairs of lugs 40 40 upon a hub 34 of eachl yoke. The said equaliZing-bar, with the clamping-nut 47 and by means of the slot contained in said equaliz-- ing-bar, is readily removed from the hubs 34 34, so that the yokes, with their integrallymade hubs, can readily be swung upon their pivots, the eccentric sleeves to the position shownin dotted line upon Fig. 2 of the draw- 1n s.

Iithin recesses 50 50 in the bed-plate 3 I secure the springs 52 52, coiled upon rods 54 54, secured in said housings, and upon the lower end of the screw-threaded rods 54 54 I secure plates 55 55, and to the under side of said plates 55 55 upon the end of rods 54 54 I fasten a screw-threaded nut 56. By means of the screw-threaded nut 56 and plate 55 the tension of the spring 52 may be increased or diminished. The upper portion of each of the springs 52 52 rests against offsets 57 57, made within the housings 50 50 of the bedplate 3. The upper portion of each of the screw-threaded bolts 54 is provided with a T portion 59, having a longitudinal perforation therein, through which a pivot-pin G0 passes. In the central and upper portion of the T portion 59 I provide a slot 61, in which slot the lower portion of the screw-threaded bolt 46 enters and is pivotally secured in said slot by means of the pivot-pin 60.

To the frame 3 3 I secure, by means of screws or other suitable devices, the end portions 70 of the hopper, and to said end portions of the hopper 70 7() I secure in any suitable manner the side portions 71 71. The said end portions of the hopper and side portions thereof converge to about the center of the frame of the machine. The side portions 71 71 if further eXtended, would converge over the point of contact of the crushing-rolls 30 30. In the opening 73 between the converging ends of the side portions 71 71 of the hopper I pivotally secure upon the rod 72, j ournaled in the end portion 70 70 of the hopper, the prisinatic-shaped cut-off 74. One end of the rod 72 projects through one end of the hopper 70 70 and has a crank projection 76, by means of which the prismatic-shaped cut-oil' is revolved within the opening 78 in the bottom of the hopper, which is in a vertical line above the point of contact of the two crushing-rolls 30 30.

The advantages of my improved machine are manifest and obvious. The crushingrolls 30 30 are keyed or otherwise fastened upon the shafts 29 and 31 and revolve in the hubs or bosses 34 34 of the free ends of the yokes 2() 20. Substances capable of being crushed which pass between the rolls cause no lateral and torsional strain upon the different portions of the rolls. The faces of the rolls at all times during the crushing operation remain parallel. Other advantages of my improved machine are readily apparent. Provision is made by means of the springs for the occasional passage of metallic and infrangible substances between the crushingrolls. By the elevation of the free ends of the yoke carrying the crushing-rolls 3() 30, journalcd in the bosses or hubs 34 34, made integral therewith, infrangible substances are permitted to pass between the rolls. The said yokes at their free ends are elevated against the action of the spiral springs 52 52. The spiral springs 52 52 ordinarily exert sufficient downward pressure through the rods and equalizing-bars 43 43 to crush and disintegrate ores, minerals, and like substances. By this construction also the crushing-rolls are prevented from being grooved and otherwise mutilated.

The operation of this invention will be readily understood from the foregoing description when taken in connection with the drawings.

It is obvious that many variations and changes in the details of construction and arrangement of my invention would read- IOO IIO

ily suggest themselves to persons skilled in the art and vs till be within the `spirit and sco e of my invention.

,i Y do not desire to confine this inventionto the specific construction, combination, and 4arrangements of parts herein shown and described, and the right is reserved to make all changes in Vand modifications of the same as come within the spirit of this invention;l but I do desire to secure as my invention all feaof said yokes, Scrapers secured to the bear-v ings, the equalizing-bars resting'upon roll ends of the yokes, and tension devices at-4 tached to said frame and removably securedvto the said bars, whereby an equal elevation ofthe rolls is maintained during the operation of crushing.

2. In ore -crushing machines, a frame, yokes having bearings and pivoted in the ends of the frame, a crushing-roll jolurnaled in the name to this specification in the iz'ing-bars upon the roll ends of the yokes, and spring tension devices for retaining the crushing-rolls at an equal elevation relativer to the frame. l

- 4. In ore-crushing machines, horizontally- 'a crushing-roll in the open end thereof, equaldis osed yokes provided with bearings in the en s of the' frame, thevcrushing-rolls journaled in'the free ends of the said yokes, equalizing-bars resting u on. the roll end of the yokes and tension evices attached to said frame and secured tothe said bars, whereby desired tension is attained In testimony whereof I have signed my presence ofl two subscribing witnesses. Y. ALBERT C. CALKINS.4 Witnesses:

C. W, HoLLrsTER, I. B.'MARLIN.. 

